And here's what made it to the top of your "Instant index" this week. Here's Ron Claiborne. We kick off this week's "Index" with ft. Myers police officer Gil Benitez braving a violent storm to rescue Michael Arnold who was stuck outside in his wheelchair. Watch as a bolt of lightning strikes perilously close to the pair. Benitez pushes the man all the way home to safety. And from heroes down south to heroes down under, way up in that tree is a koala who fled there after being hit by a car first, they had to get him down, and then emergency responders performed heart massage and even mouth to snout resuscitation. Good boy. It worked. And meet grandma Betty, a 76-year-old Minnesota woman and cancer survivor who was challenged to drag race by a brash young man named peter. Take that, peter! And finally, a new video version of "Happy" by the kids and staff at camp mark seven in upstate New York, a camp for deaf children. They sang the lyrics in American sign language. ? Pharrell Williams saw it, liked it and gave the kids a shout-out. I'm Ron Claiborne. And that's this week's "Instant index."

This transcript has been automatically generated and may not be 100% accurate.

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